GFR, RBF

Question 1

Describe pressures in renal vasculature

Answer 1

Afferent resistnace is lower than systemic arterioles, Glomerular cap pressure is higher than systemic, Peritubular cap hydro pressure is low and onc is higher

Question 2

what starling forces change along glom. cap

Answer 2

the cap oncotic pressure goes up. so Puf goes down

Question 3

what is the normal GFR

Answer 3

125 ml/min

Question 4

how does GFR change with efferent arteriolar constriction

Answer 4

goes up due to rising Pgc then goes down due to decreasing RPF

Question 5

Two theories for renal autoregulation

Answer 5

Myogenic: ^ transmural pressure leads to vasoconstriction. Tubuloglomerular: ^ flow sensed by JGA (as ^ NaCl) leads to afferent constriction via adenosine

Question 6

equation for Renal Plasma flow

Answer 6

RBFx(1-Hct)

Question 7

Formula for clearance

Answer 7

[Ux(V)]/Px

Question 8

How does inulin excretion and clearance vary with increasing P[inulin]

Answer 8

excretion increases linearly. clearance remains constant